Muzzle brake



FIG. 1 is a perspective front view of a muzzle brake;

FIG. 2 is a front elevation view of the muzzle brake;

FIG. 3 is a rear elevation view of the muzzle brake;

FIG. 4 is a left elevation view of the muzzle brake;

FIG. 5 is a right elevation view of the muzzle brake;

FIG. 6 is a top elevation view of the muzzle brake; and,

FIG. 7 is a bottom elevation view of the muzzle brake. 

CLAIM The ornamental design for a muzzle brake, as shown and described. 